Pulley.



L. WHITCOMB.

PULLEY.

APPLICATION FILED 050.121.1911.

' Patented. 0@1.12,1915.

LVVENTOR;

ATTORNEY? IVITNESSES:

COLUMBIA PLANOGRAPH COHWASHINUTOMD1C.

TED ewe rm w s LAWRENCE VJHITCOM'B, OF BROOKLIN'E, MASS-AGH-USETTS, ASSIGNOR- 1 0 THE'GORK INSERT COMPANY, OF BOSTON, MASSACHUSETTS, A- GORPORA TION OE MAINE.

' PULLEY.

Specification of Letters Patent.

PatentedOct. 12, 1915..

j r ncatitn filed December 18, 1911. Seria1 No.66'6,39 1.

To all whom it may concern.

Be it known that I, LAWRENCE Y'Vrirrcoa'm, a citizen of the United States, residing in Brookline, county of Norfolk, and fe t-ate of liila ssa'chusetts, have invented: an Improvement in Pulleys, of which the" following de scription, in connection with the accompanying drawings, is a specification, like letters on the drawings re )resenting like parts.

This invention relates to pulleys of that class having thin or substantially thin metal circumferential im portion, either circular or conical in form, and has for'its object to increase the frictional efficiency of pulleys of this class, Without materially increasing the weight and cost of the same, whereby a light and efficient pulley is obtained, which is especially adapted among other uses tobe employed on spinning frames, cotton pickers and like machines. To this end,- the thin metal rim of the pulley is provided with a plurality of holes or openings through which are extended ins'erts of cork or other non-metallic material, which have their outer ends fiu'sh'or substan tially flush with the outer circumference of the metal rim, and their inner ends extendedinto sockets formed in a center or body portion of plaster of Paris or other light, n-on metallic' material,- whi'ch is normally in r a plastic condition, so that it can be molded or packed or tamped' within the metal rim and allowed to harden thereon,-a=nd which is retained therein by suitable retaining walls.

Figure 1 is plan view of two pulleys or Speeder cones embodying this invention, and belted together after the manner common to spinning frames. Fig; 2, a longitudinaloentral section of the concaved conical pulley shown in Fig. 1, the section being taken on the line 2'2, and Fig. 3,- a cross section of the conveXed conical pulley shown in Fig. 1.

In the present instance, I have shown the invention as embodied in conical pulleys a, I), connected by a belt 0, one of said pulleys as a being concaved and the other as bbeing convexed, said pulleys being such as are now commonly used in spinning frames and known as the speeder cones thereof. These cones in the operation of the spinning frame play an important part, and it is highly desirable that the belt 0 should slip as little as possible, so as to avoid slackening of the tension on the roving, which results in variation of the twist and uneven weight in the roving, andif this slackening is excessive, the roving becomes tangled, which requires stopping of' the spinning frame and resetting of the cone belt 0'.

' The cone belt tension is fined by the weight of the lower cone Z) and its cradle (not shown), consequently any variation of slip of the belt 0 must come from the condition of the surfaces of the cone pulleys a, Z), and in practice a slip of over 3% is suffici'ent to cause the troubles above noted. The elimination. of slip on s'peeder cones is most desirable as there is obtained thereby, a more even roving with less re'adju'stmcnts of the machine, such as resetting of cone belt, changing tension" gear and changing: lay geaun The present invention has for its object to provide a construction of pulley, which can be incorporated in speed-er cones, so as to avoid the difficulties above noted and thereby obtain the superior results above noted. To accomplish this result, the pul ley is provided within it with a body 7 of nonmetallic material in plastic form, such for in'stai-rce as plaster of Paris, which body is molded, tamped or pressed int-othe interior' of the pulley against a retaining wall, which is shown in Fig. 3 as composed of an annular flange 10on the inner circumference of the metal rim and a collar 12- secured to said flange and mounted on a shaft 13.

The plastic material preferably fills the interior of the cone about the shaft 13 as represented in Fig. 2, and after the pulley has been filled, the end of the pulley through which the plastic material is inserted is closed by a disk or plate 15, which is secured to an internal flange 16 on the rim ofthe pulley. and forms a retaining wall for the plastic material, which is allowed to harden, and when hard, sockets 17 are formed in the body portion when the holes in the rim of the pulley are drilled, and the corks 18 are inserted under compression into said sockets, with their outer surfaces substantially flush or projecting slightly above the outer circumference of the rim. The collar for the pulley.

The plastic non-metallic material is light and adds but little to the weight of the pulley, while it enables pulleys with thin rims to be provided with frictional inserts at a minimum expense and without adding materially to the cost of the pulley. Further- 12 and disk 15 constitute one form of hub more, the plastic material enables pulleys of small diameters and especially conical pulleys of small diameter at the apex portion of the cone, to be provided with cork inserts, where otherwise it would be impracticable to use a count of the small diameter of the cone or pulley and further on account of the weight which would be added to the pulley.

Claims.

1. As an improved article of manufacture, a pulley having a substantially thin metal rim portion provided with a plurality of holes or openings extended through it, a body of substantially light, normally plastic, non-metallic material, capable of being easily drilled and located within said rim and provided with sockets which register with the holes in said rim, retaining walls for said normally plastic material within said rim, and inserts of cork forming part of the outer surface of said rim and extended through the holes in said rim into the sockets in the normally plastic material.

2. As an improved article of manufacture, a pulley having a substantially thin metal rim portion provided with a plurality of holes or openings extended through it, a body of substantially light non-metallic material capable of being. easily drilled and located within said rim and provided with sockets which register with the holes in said rim, said material being normally plastic to enable it to be molded or pressed within the rim of the pulley and capable of hardening when dried, means for confining the said plastic material within the said rim, and in-. sorts of non-metallic material forming part of the outer surface of said rim and extended through the holes in said rim into said sockets.

3. As an improved article of manufacture, a pulley provided with a substantially thin conical metal rim having a plurality of holes extended through it, substantially light nonmetallic normally plastic material capable of being easily drilled and substantially filling the said conical rim and having a plurality of sockets registering with the Copies of this patent may be obtained for normally rigid filler on acholes in said rim, retaining walls for said normally plastic material, said walls being located near the ends of the conical rim, and inserts of non-metallic material forming part of the outer surface of said rim and extended through the holes in said rim into said sockets.

4. As an improved article of manufacture,

extended through said rim into said plaster of Paris body, substantially as described.

6. The combination with a machine element having a thin-shelled body portion, of a filling or lining of plastic material introduced into said body portion, holes being formed in the shell and pockets or seats extending into the said plastic material, and inserts occupying said holes and pockets or seats with their outer ends exposed for frictional purposes.

7. In a cone-pulley, the combination with a thin shell forming the body thereof, of a filling or lining of plastic material, holes being formed in the shell and pockets or seats extending into the said plastic material, and inserts occupying said pockets or seats with their outer ends exposed for frictional purposes.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

LAWRENCE WHITCOMB.

Witnesses JAS. H. CHURCHILL, J. MURPHY.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

